Robertson takes home the winner's cheque of £150,000 for adding the UK title to world and Masters honours, though good friend and perennial rival Selby also goes home considerably richer with the runner-up purse and additional prize money for a 147 break earlier in the tournament.
The Australian trailed by five frames to three heading into the final evening session, but after battling his way into an 8-7 lead Robertson watched on as Selby fought back in frame 16 and was on the verge of 8-8, only to rattle the final black against the knuckles.
Robertson said after wrapping up the very next frame: "To become the first overseas player to win all three is a fantastic achievement. Ding Junhui and I burst onto the scene around the same time and we had discussed such a feat with one another many times.
"I am sure Ding will also pull it off one day, but to become the first from overseas to win the triple crown is amazing."
Opening session report
Mark Selby takes a 5-3 lead over world number one Neil Robertson going into the final session of the UK Championship.
Selby was imperious for much of the afternoon session as he opened up a 5-1 lead but Robertson, who is aiming to add the UK Championship to his world and Masters titles to complete snooker’s triple crown, fought back valiantly.
The Jester from Leicester, who produced a wonderful 147 in his semi-final against Ricky Walden, opened with a polished 130 but his Australian opponent took frame two with runs of 13 and 63.
Selby took the next four frames to ensure that he went into the interval with the lead but Robertson, who had hitherto littered his performance with some uncharacteristic errors, constructed breaks of 54 and 123 to cuts the deficit.